Search

JP-2026075459-A - Apparatus for manufacturing long sheets made of carbon nanotubes, and method for manufacturing long sheets made of carbon nanotubes

JP2026075459AJP 2026075459 AJP2026075459 AJP 2026075459AJP-2026075459-A

Abstract

[Problem] To provide a CNT long sheet manufacturing apparatus for efficiently producing highly useful CNT long sheets. [Solution] The lamination drum for laminating CNT films has a cylindrical shape and a slit-shaped discontinuous portion extending parallel to the axial direction on its outer circumference; a first inner roll disposed in the hollow space of the lamination drum and winding a release film that is wrapped around the outer circumference of the lamination drum via the discontinuous portion; a second inner roll disposed in the hollow space and recovering and winding the release film wound around the outer circumference of the lamination drum via the discontinuous portion; and a substrate to which a CNT forest is attached for adhering a CNT web to the release film wound around the outer circumference of the lamination drum. The lamination drum is rotatably arranged so that the CNT film with the CNT web laminated on it can be laminated on the release film, and the second inner roll winds the CNT film together with the release film. [Selection Diagram] Figure 1

Inventors

  • 杉原 康介
  • 三好 歩
  • トウ コウエイ

Assignees

  • 株式会社カーボンフライ

Dates

Publication Date
20260508
Application Date
20241022

Claims (9)

  1. A lamination drum for stacking carbon nanotube films, having a cylindrical shape and having slit-shaped discontinuous portions extending parallel to the axial direction on its outer circumference, A first inner roll is positioned in the hollow space of the laminated drum and winds a release film around the outer circumference of the laminated drum via the discontinuous portion, A second inner roll is positioned in the hollow space and recovers and winds the release film, which is wound around the outer circumference of the laminated drum, through the discontinuous portion. The laminated drum comprises a substrate to which a carbon nanotube forest for adhering a carbon nanotube web is attached, and the release film wrapped around the outer circumference of the laminated drum. The lamination drum is rotatably arranged so that a carbon nanotube film, on which the carbon nanotube webs are laminated, can be laminated onto the release film. The apparatus for manufacturing long sheets made of carbon nanotubes is characterized in that the second inner roll winds the carbon nanotube film together with the release film.
  2. The carbon nanotube long sheet manufacturing apparatus according to claim 1, characterized in that the first inner roll and the second inner roll are arranged such that their respective central axes are located between the central axis of the laminated drum and the outer circumference of the laminated drum.
  3. The carbon nanotube long sheet manufacturing apparatus according to claim 1, characterized in that the outer circumference of the laminated drum is 1.5 m or more and 10 m or less.
  4. A method for manufacturing a carbon nanotube long sheet using the carbon nanotube long sheet manufacturing apparatus described in claim 1, wherein the carbon nanotube long sheet is manufactured using the carbon nanotube long sheet manufacturing apparatus described in claim 1, Setting steps include: wrapping the release film, which is set on the first inner roll, around the outer circumference of the laminated drum and then fixing it to the second inner roll; A layer formation step comprising: drawing the carbon nanotube web from the carbon nanotube forest, rotating the lamination drum multiple times while bringing it into contact with the release film, thereby forming the carbon nanotube film on the release film by laminating the carbon nanotube web; A cutting step of cutting the carbon nanotube film at the location of the discontinuous portion, A coating step is to fix one side of an additional release film, which has a length of 1/n of the circumference of the outer edge of the separately prepared laminated drum, to the position of the edge of the discontinuous portion, and to cover the carbon nanotube film with the additional release film. A method for manufacturing a long sheet of carbon nanotubes, comprising a winding step in which the sandwich-like layer formed in the coating step, in which the carbon nanotube film is sandwiched between the release film and the additional release film, is wound onto the second inner roll, and thereafter the layer formation step, the cutting step, the coating step, and the winding step are repeated for multiple cycles.
  5. Immediately before the winding step of the nth cycle, on the release film wound around the outer circumference of the laminated drum, a carbon nanotube laminated film is formed in order from the first inner roll side end of the discontinuous portion toward the second inner roll side end, consisting of n layers of the carbon nanotube film, a carbon nanotube laminated film consisting of n-1 layers of the carbon nanotube film, ..., and the carbon nanotube laminated film consisting of one layer of the carbon nanotube film. The carbon nanotube laminated film, in which multiple layers of the carbon nanotube film are laminated, is characterized in that the carbon nanotube film formed in newer cycles is laminated towards the upper layers, as described in claim 4.
  6. Immediately before the winding step of the second cycle of the carbon nanotube long sheet manufacturing method, the additional release film has a length equivalent to half the circumference of the laminated drum. On the half-circumference of the laminated drum on the second inner roll side, a two-layer carbon nanotube laminated film is formed, in which a carbon nanotube film newly formed in the second cycle is laminated on top of the carbon nanotube film formed in the first cycle. The method for manufacturing a long carbon nanotube sheet according to claim 5, characterized in that a single layer of the carbon nanotube laminated film, made of the carbon nanotube film newly formed in the second cycle, is formed on half of the first inner roll side of the laminated drum.
  7. A long sheet made of carbon nanotubes, with a length of 100 m or more, a width of 1 m or more, and a basis weight of 0.0226 mg/ cm² to 170 mg/ cm² .
  8. A long carbon nanotube sheet according to claim 7, comprising 20 to 10,000 layers of carbon nanotube webs laminated together.
  9. A long sheet made of carbon nanotubes according to claim 7, A laminate comprising a long sheet of carbon nanotubes and a release film disposed on both surfaces thereof.

Description

This invention relates to an apparatus for manufacturing long carbon nanotube sheets, a method for manufacturing long carbon nanotube sheets, long carbon nanotube sheets, and laminates. Carbon nanotubes (CNTs) have been known for some time as tubular nanomaterials composed solely of carbon atoms (see, for example, Patent Document 1). Due to their thinness, lightness, and flexibility, carbon nanotubes (hereinafter abbreviated as CNTs) are attracting attention as a next-generation carbon material. Japanese Patent Publication No. 2023-128466 This is a perspective view showing an overview of a CNT long sheet manufacturing apparatus according to an embodiment.This is a schematic diagram showing the state of the setting step (S1) in the CNT long sheet manufacturing method according to the embodiment, in which the release film unwound from the first inner roll is wrapped around the outer circumference of the laminated drum.This is a schematic diagram showing the layer formation step (S2) in the CNT long sheet manufacturing method according to the embodiment, in which a first carbon nanotube layer (hereinafter referred to as the first CNT film layer) is formed on a release film wrapped around the outer circumference of a laminated drum.This is a schematic diagram showing the CNT layer cutting step (S3) in which the discontinuous portion is cut, and the coating step (S4) in which an additional release film, corresponding to half the circumference of the laminated drum, is placed over the first layer of CNT film in a method for manufacturing a long sheet made of CNT according to an embodiment.This is a schematic diagram showing a state in which, in a method for manufacturing long sheets made of CNT according to an embodiment, a sandwich-like layer is formed on the second inner roll side of the outer circumference of the laminated drum, and a base layer is formed on the first inner roll side of the outer circumference of the laminated drum.This is a schematic diagram showing the winding process (S5) in which a sandwich-like layer is wound onto a second inner roll in a CNT long sheet manufacturing method according to an embodiment.This is a schematic diagram showing the layer formation process (S2) of the second cycle in the CNT long sheet manufacturing method according to the embodiment, in which a second CNT film layer is formed on top of the first CNT film layer.This is a schematic diagram showing the second cycle CNT layer cutting step (S3), in which the discontinuous portion is cut, and the second cycle coating step (S4), in which a release film with a length equivalent to half the circumference of the laminated drum is placed over the second layer of CNT film, in a method for manufacturing a long sheet made of CNT according to an embodiment.This is a schematic diagram showing a state in which, in a method for manufacturing long sheets made of CNT according to an embodiment, a sandwich-like layer is formed on the second inner roll side of the outer circumference of the laminated drum, and a base layer is formed on the first inner roll side of the outer circumference of the laminated drum.This is a schematic diagram showing the winding process (S5) of the second cycle in the CNT long sheet manufacturing method according to the embodiment, in which a sandwich-like layer is wound onto a second inner roll.This is a schematic diagram showing the third cycle layer formation step (S2) in the CNT long sheet manufacturing method according to the embodiment, in which a second CNT film layer is formed on top of the first CNT film layer.This is a schematic diagram showing the process of obtaining a long sheet made of CNT according to the embodiment. The following description will refer to the drawings to explain an embodiment of the CNT long sheet manufacturing apparatus according to the present invention. Figure 1 is a perspective view showing an overview of the CNT long sheet manufacturing apparatus. In this disclosure, expressions describing relative or absolute arrangements such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "intermediate," "concentric," or "coaxial" not only strictly describe such arrangements but also include states of relative displacement with tolerances or angles or distances sufficient to achieve the same function. As shown in Figure 1, the CNT long sheet manufacturing apparatus 2 comprises a laminated drum 4, a first inner roll 6, a second inner roll 8, and a substrate 15 to which the CNT forest 16 is attached. The laminated drum 4 is a cylindrical drum having a cylindrical hollow space 10 inside, and is equipped with a slit-shaped discontinuous portion 12 extending parallel to the axial direction. The outer circumference length of the laminated drum 4 is preferably 1.5 m to 10 m, more preferably 2 m to 6 m from the viewpoint of workability, and even more preferably 2.5 m to 4 m. From the viewpoint of manufacturing long sheets of CNT with a small numbe